Sunday, 2019-07-21

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tumbleweedI had forgotten and rediscovered :P17:05
tpbTitle: encoder broken: JPEG file: starts with 0x15 0x0c · Issue #465 · timvideos/HDMI2USB-litex-firmware · GitHub (at
CarlFKtumbleweed: mithro said something like "maybe there isn't a timing constraint specified, so sometimes it builds ok because the (magic gnomes) route things better."17:07
CarlFK"maybe xobs fixed this by building over and over"17:07
tumbleweedthat makes me rather sad17:08
CarlFKI tried that a few days ago, but I was just doing "make image" which may not have been kicking the gnomes into re doing whatever is randomly done17:09
tumbleweedit doesn't seem like a once-off issue17:09
tumbleweedbuilds from after that point don't have a working encoder17:09
CarlFKyeah - my ignorant guess is more things got added that give the gnomes less room to work with so they cant accidentally make it work any more17:10
tumbleweedsounds legit17:10
tumbleweedI mean, some constraint that isn't specified but was accidentally achieved17:11
CarlFKAndy or Ben might be able to chase this17:11
CarlFKoh wait, Andy is on site, no time.17:12
CarlFKtell him no beer tonight until he fixes it.17:12
CarlFK                  Decode error #55: Not a JPEG file: starts with 0xff 0xda               #47617:15
tpbTitle: Decode error #55: Not a JPEG file: starts with 0xff 0xda · Issue #476 · timvideos/HDMI2USB-litex-firmware · GitHub (at
CarlFK"same thing" - with an example image that was valid jpeg, but still broken, which made my automated tests pass and keep me confused for a while, which means icky bug report data durning that time.17:16
tumbleweedyeah, I saw that one17:17
tumbleweedI mean the issue, didn't reproduce it17:17
CarlFKoh, I think if you run the same gst "grab 1 frame" test, 9 times it will error, 1 time it will not error but save a visually broken image17:18
CarlFKbut that's based on testing 60ish "make image" results 1x each17:19
tpbTitle: [HDMI2USB] Convert the JPEG encoder from VHDL to Migen/MiSoC · Issue #31 · timvideos/getting-started · GitHub (at
CarlFK"current JPEG encoder ... It has been the cause of numerous bugs."17:29
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